Supporting structure



Jan. 17, 1933. c, HARTER SUPPORTING STRUCTURE Original Filed Aug. 22,1929 Patented Jan. 17, 1933 UNITED STATES PATENT CFHQE EVAN G. HARTER,OF STURG-IS, MICHIGAN SUPPORTING STRUCTURE Application filed August 22,1929, Serial No. 387,620. Renewed May 9, 1932.

My invention relates to supporting structures comprising a base portionand another portion adjustable up and down, and rotatable, thereon, suchportion in the case of a stool or chair forming the seat portion of thearticle and in the case of a table the top thereof.

One of my objects is to provide a novel, simple, strong and inexpensiveconstruction of supporting structure of the character above stated,embodying highly effective means permitting of the desired verticaladjustment of said portion and securely holding it in adjusted position,while permitting its rotation, against accidental lowering.

Another object is to provide in a supporting structure involving such avertically adjustable and rotatable portion, the adjustment beingeflected by a pin carried by a stop member on such portion and adaptedto engage in one of a number of holes arranged along such portion, forthe maintaining of the pin in line with the series of holes, when thepin is withdrawn from operative position, to expedite the re-positioningof the pin in any one of the selected holes in readjusting thevertically movable portion of the structure; and other objects as willbe manifest from the following description.

Referring to the accompanying drawing:

Figure 1 is a view in side elevation of the lower portion of a stool orchair embodying my invention.

Figure 2 is an enlarged view in vertical sec- 5 tional elevation of aportion of the structure shown in Fig. 1, the section being taken at theline 22 on Fig. 1 and viewed in the direction of the arrow; and

Figure 3, a section taken at the line 3-8 on Fig. 2 and viewed in thedirection of the arrow.

In the drawing, the base portion of a stool, chair, or the like, isrepresented at 4, this base portion being shown as comprising fourequidistantly spaced supporting legs 5 rigidly held together at theirinwardly deflected vertical leg portions 6 by any suitable means, thoseshown comprising vertically spaced plates 7, 8 and 9.

The seat portion of the structure comprises upon the portion 11 of thepost.

The post 10 is adjustable up and down, and rotatable, in bushings 13 and1d positioned in openings 15 and 16 in the plates 7 and 8 and projectsdownwardly through a central opening in the plate 9.

A stop member, in the form of a collar 17 provided on the post 10 ispositioned between the bushings l3 and 1d and cooperates with thebushing 14 to hold the post 10 against descent, while permitting thepost and collar to rotate as a unit.

The post 10 is adjustable up and down in the collar 17 to vary theheight at which the seat portion above referred to extends, the collar17 to this end being provided with a pin, in the form of a set screw 18threaded in an opening 19 in the collar and adapted to enter any one ofavertical series of openings 20 provided in the post 10, the set screw 18when adjusted to extend into any one of the openings 20 connecting thepost 10 and collar 17 together for holding the post in the desiredposition of vertical adjustment, while permitting the latter, togetherwith the collar 17, to rotate upon the base portion of the structure.

In order that relative rotary movement of the post- 10 and collar 17 beprevented, upon withdrawal of the set screw 18 from operative position,and which, if occurring, would present considerable difliculty in readjusting the set screw 18 into engagement with the desired one of theholes 20, means are provided preventing such relative rotation, themeans shown comprising a projection 21 extending inwardly from the innersurface of the collar 17 and into a groove 22 in the outer surface ofthe post 10 and extending lengthwise of the latter, the relativepositions of the holes 20, set screw 18, projection 21, and groove 22,being such that the pin 18 is held at all times i alinement with theseries of holes 20.

While I have illustrated and described a. particular constructionembodying my invention, I do not wish to be understood as intending tolimit it thereto as the same may 5 be variously modified and alteredwithout dearting from the. spirit of my invention.

\Vhat I claim as new, and desire to secure by Letters Patent, is: W

1. In a supporting structure, the combina- 13 tion of a basemember,spaced plates on said base member, bushings extending through saidplates, said bushings having portions located between and in contactwith the plates preventing their displacementotherwise than 15 throughthe space between the plates, a collar disposed intermediate saidbushings and" adapted for rotation, said collar maintaining saidbushings in operative engagement with the plates, a post passing throughthe bushings and collar, said post having a longitudinal series ofopenings, an adjustable projection carried by the collar'to selectivelyengage said openings so that the position of the post may be varied, andinterengaging means between the collar and post preventing rotationofthe collar relatively to the post andrpermitting longitudinaladjustment of the post relatively to the collar, when said projection isdisengaged from said openings.

2. In a supporting structure, the combination of a base member havingplates in spaced relation, said plates having openings therethrough,bushings extending through said openings and having shoulders abuttingsaid plates and located in the space between them, a collar disposedbetween and in contact with said bushings for rotation, a post passingthrough theibushings and collar, said post having a longitudinal seriesof openings, a

0 projection carried bythe collar and radially adjustable thereon toengage and disengage said openings to vary the position in which thepost is fastened, said post having a longitudinal slot, and a projectionon said collar 5 disposed in said slot, whereby the collar can not turnrelatively to the post but the latter may slide relatively to the collarwhen the first mentioned projection is disengaged from the openings.

EVAN C. HARTER.

